Crusher and pulverizer



H. M. PLAISTED CRUSHER AND PULVERIZER. APPLICATION FILED JIULY 19,1920.

PatentdSept. 5, 1922., I

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@R'USEER AND PUB i application filed riuly is,

To all wiwmz't may concern:

Be it known that l, llanonn M. PLAIsr'nn, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Crushers and Pulverizers, of which the following is a specification.

This invention relates to certain new and useful improvements in crushers and pulverizers, the peculiarities of which will be hereinafter fully described and claimed.

The main object of my invention is to provide a crusher having means to guard an outlet passage leading to a chamber for the reception of metal pieces that maybe mixed with the feed or other material being ground,such guarding means being adapted to prevent the discharge of the ordinary feed but to allow the exit of pieces may be mixed with the feed; another object is to provide a cage in sections that can he readily inserted or removed through the side of the crusher, and secured in place; another object is to provide a top wall that is removable to give access to the guarding means of the outlet passage, and also to the interior of the casin of the crusher. Tn the accompanying drawing on which like reference letters indicate corresponding parts, Fig. i represents a vertical sectional view transverse to the shaft; Fig. 2 a similar sectional view on the line 2-2 of Fig. 1; Fig. 3 a side elevation of a crusher exemplifying my improvements; Fig. i a detail plan view of one section of my cage; and Fig. 5. a partial section illustrating the method of inserting the cage into the crusher.

The letter A. indicates the shaft of a crusher provided with hammers B of any suitable style pivotally mounted on discs 0 or other haer supports. The casing is provided with a hopper l), and side walls E in which are formed arcuate slots F concentric with the shaft A. and extending from a breaker plateG at the month of the hopper around towards the back, as shown in Figs. 1 and 3. This arcuate slot is s-ianned by side webs ll of the shaft bracket i on which the hearing is mounted, and

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erably connected with each other by webs N of lesser radial depth than the bars that cross brace them as shown in Fig. 1, Fig. 2 and Fig. 4: at the bottom or outer portion of the bars only, so as not to lessen the efiective length of the inner cutting edges of the bars. Three or more bars are in each section and the section is preferably formed in one integral casting with the tops of the bars M chilled to improve the wearing qualities. The ends K projecting from the side pieces L are provded with holes 0 throfugh which are passed pin-keys P that are long enough to engage the wall E on both sides of the slot F as shown in Fig. 3 and Fig. 2, and prevent the sectional cage from shifting laterally' The side piece L is preferably a little wider than the bars place in the arcuate slot, the sidepieces act as fillers to close up the arcuate openings and present a flush appearance on each side of the casing except for the projecting lugs K that receive the pins. full radial depth of the side piece but is located at or near the upper edge of said piece to facilitate insertion of the sectional cage This lug is not the into the crusher. by means of a hooked bar Q Fig. 5, which engages the opening 0' and bears on the side of one slot as the sectional cage is inserted through the other slot as shown in 5. The'hooked bar Q supports the entering end-of the sectional cage and readily draws it'into its closing position as shown in Fig. 2.

Whenever it is necessary to remove one of the cage sections the keyins are loosened.

by a tap of the hammer an taken out, and,

except when the bracket'wall H is opposite a cage section, the section may be readily drawn out laterally. For removing a section opposite the wall H it is only necessary to talre out one of the other sections and slide M, and when in ing on a shoulder T Fig. 2, and fitting against the wall of the hopper D at one end, and into a notch at the bottom end adjacent to the cage. The cover is secured by cross rods T, bearing on the cover to hold itin place and yet allow of it being readily removed in order to give access to a hinged door U, pivotally mounted at its lower end by a rod V and guarding an outlet in the upper wall W of the disintegrating chamber above the rotor, which wall meets the rear wall 3 of the hopper D. The partition wall W, the wall 3, and the cover S, together with the sides of the casing, form a chamber above the rotor with which the outlet passage 4 guarded by the door U, communicates. vertical partition 5 adjacent tothe door'provides an opening. 6 between its ,upper edge and the top wall S, over whichmetal pieces are thrown by the hammers when they are driven against the hinged door U and throw said door upwardly as indicated by dashed lines Fig. 1. Gravity or other means cause the door to drop back automatically upon a lip 7 at one end of the wall W, until another piece of metal is driven with force against the door and causes it to rise to permit the exit of said metal piece. The weight of the door U is sufiicient to deflect the regular feed material so that it will pass the opening and be directed by the wall WV around to the breaker plate once more. The curved wall R extends forward horizontally to form a stop bar 8 for the cage at the end of the arcuate slots, and also to protect the pivot of the door U from impact of metal that may break the hinge.

The partition wall W above the rotor is preferably curved eccentric to the shaft with an increasing space between the hammer circle and the said wall in the direction of motion. This eccentric curve tends to prevent the lodgment of material against the wall as it is deflected around to the breaker plate. A slide 9 on the wall 3 of the hopper regulates the opening at the bottom of the hopper. lln the side walls opposite themetal catcher chamber are openings 10 protected by covers 11 to allow of clearing out the said chamber.

Any space left at the end of the arcuate slot after the cage sections have been located therein is taken up by a filler strip 12 that causes the sections to bear on each other and neaaeea against the stop bar, 8 at the end of the slot. at

The key at each end of the section forms a shoulder on the outside at each end to maintain the cage in its located position.

I claim:

1. A crusher having a casing with a partition forming upper and lower chambers, and a rotor hammer in said lower chamber,- said partition including a swinging door, pivoted at its lower end and substantially concentric with the path of travel of said hammer.

2. A crusher comprising a rotor, a casing having side, top, and partition walls forming a disintegrating chamber and an upper chamber adjacent'to said rotor,--the partition wall being adjacent to the rotor circle,

and having an opening communicating with said latter chamber,and an inclined door pivoted at the lower edge of said opening and in line with said partition wall, the easing having a bar located near the lower edge of said door and protecting the pivot, substantially as described.

3. A crusher comprising a casing having side, top and partition walls forming a rotor chamber and also a chamber above the rotor chamber,-said partition wall having an opening into the upper chamber -and' a door pivoted by one edge in said opening and opening upward,-said top wall limit ing the upward movement of said door so that it will gravitate to its closed position, substantially as described.

4:. A crusher comprising a casing having arcuate slots throu h the sides a ca e in sec- Po 7 D tions located in said slots and having lugs with holes projecting beyond the sides oi the casing, and key pins in said holes bearing on the outside of the casing adjacent to the slots, substantially as described.

5. A crusher comprising a casing having arcuate slots through the sides, bracket walls spanning said slots and having opening opposite said slots, a cage in sections mounted in said slots and having lugs provided with .2116

holes projecting beyond the sides of the casing and slidable circumt'erentially to their located position, key pins in said holes to prevent endwise movement of said sections, and a filler key passing through slots and securing the sections against lateral displacement.

6. A crusher comprising a casing having arcuate slots through the sides, a cage in sec tions adapted to enter endwise said slots and 2%.

each section having a ing on the entering end projecting outside the casing and provided with a radially transverse hole and key pie. in said hole located transversely said slot and engaging the casing near the and 251-2 upper face of each section.

7. A crusher comprising a cas insections mounted in said sl0ts,--each section consisting of side frames curved to conform to the arcuate-slots and substantially closing said slots when in located position and spaced cross bars connecting said curved frames,the said bars having a lesser radial depth than the frames and providing clearance to facilitate mounting the sections, and means to secure said sections.

8. In a crusher of the kind described, a sectional cage, each section consisting of integral curved sides and spaced connecting bars having intermediate integral connecting webs of lesser radial depth than the bars and locatedaway from the inner grinding face and connecting the bottom portion of tition wall,'and a removable cover for the upper chamber mounted between the side walls, and means to hold said cover in place but allowing of removal to give access to said upper chamber.

In testimony whereof I have afiixed my signature. p

- HAROLD M. PLAISTED.- 

